| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: pmapdump.c,v 2.12 2018/11/21 19:30:59 rschregle Exp $"; |
| 3 |
#endif |
| 4 |
|
| 5 |
/* |
| 6 |
====================================================================== |
| 7 |
Dump photon maps as RADIANCE scene description to stdout |
| 8 |
|
| 9 |
Roland Schregle (roland.schregle@{hslu.ch, gmail.com}) |
| 10 |
(c) Fraunhofer Institute for Solar Energy Systems, |
| 11 |
(c) Lucerne University of Applied Sciences and Arts, |
| 12 |
supported by the Swiss National Science Foundation (SNSF, #147053) |
| 13 |
====================================================================== |
| 14 |
|
| 15 |
$Id: pmapdump.c,v 2.12 2018/11/21 19:30:59 rschregle Exp $ |
| 16 |
*/ |
| 17 |
|
| 18 |
|
| 19 |
|
| 20 |
#include "pmapio.h" |
| 21 |
#include "pmapparm.h" |
| 22 |
#include "pmaptype.h" |
| 23 |
#include "rtio.h" |
| 24 |
#include "resolu.h" |
| 25 |
#include "random.h" |
| 26 |
#include "math.h" |
| 27 |
|
| 28 |
|
| 29 |
/* Defaults */ |
| 30 |
/* Sphere radius as fraction of avg. intersphere dist */ |
| 31 |
/* Relative scale for sphere radius (fudge factor) */ |
| 32 |
/* Number of spheres */ |
| 33 |
#define RADCOEFF 0.05 |
| 34 |
#define RADSCALE 1.0 |
| 35 |
#define NSPHERES 10000 |
| 36 |
|
| 37 |
|
| 38 |
/* RADIANCE material and object defs for each photon type */ |
| 39 |
typedef struct { |
| 40 |
char *mat, *obj; |
| 41 |
} RadianceDef; |
| 42 |
|
| 43 |
|
| 44 |
/* We use %e for the material def to preserve precision when outputting |
| 45 |
photon flux */ |
| 46 |
const RadianceDef radDefs [] = { |
| 47 |
{ "void glow mat.global\n0\n0\n4 %e %e %e 0\n", |
| 48 |
"mat.global sphere obj.global\n0\n0\n4 %g %g %g %g\n" |
| 49 |
}, |
| 50 |
{ "void glow mat.pglobal\n0\n0\n4 %e %e %e 0\n", |
| 51 |
"mat.pglobal sphere obj.pglobal\n0\n0\n4 %g %g %g %g\n" |
| 52 |
}, |
| 53 |
{ "void glow mat.caustic\n0\n0\n4 %e %e %e 0\n", |
| 54 |
"mat.caustic sphere obj.caustic\n0\n0\n4 %g %g %g %g\n" |
| 55 |
}, |
| 56 |
{ "void glow mat.volume\n0\n0\n4 %e %e %e 0\n", |
| 57 |
"mat.volume sphere obj.volume\n0\n0\n4 %g %g %g %g\n" |
| 58 |
}, |
| 59 |
{ "void glow mat.direct\n0\n0\n4 %e %e %e 0\n", |
| 60 |
"mat.direct sphere obj.direct\n0\n0\n4 %g %g %g %g\n" |
| 61 |
}, |
| 62 |
{ "void glow mat.contrib\n0\n0\n4 %e %e %e 0\n", |
| 63 |
"mat.contrib sphere obj.contrib\n0\n0\n4 %g %g %g %g\n" |
| 64 |
} |
| 65 |
}; |
| 66 |
|
| 67 |
/* Default colour codes are as follows: global = blue |
| 68 |
precomp global = cyan |
| 69 |
caustic = red |
| 70 |
volume = green |
| 71 |
direct = magenta |
| 72 |
contrib = yellow */ |
| 73 |
const COLOR colDefs [] = { |
| 74 |
{0.25, 0.25, 2}, {0.1, 1, 1}, {1, 0.1, 0.1}, |
| 75 |
{0.1, 1, 0.1}, {1, 0.1, 1}, {1, 1, 0.1} |
| 76 |
}; |
| 77 |
|
| 78 |
|
| 79 |
int main (int argc, char** argv) |
| 80 |
{ |
| 81 |
char format [MAXFMTLEN]; |
| 82 |
RREAL rad, radScale = RADSCALE, extent, dumpRatio; |
| 83 |
unsigned arg, j, ptype, dim, fluxCol = 0; |
| 84 |
long numSpheres = NSPHERES; |
| 85 |
COLOR customCol = {0, 0, 0}; |
| 86 |
FILE *pmapFile; |
| 87 |
PhotonMap pm; |
| 88 |
PhotonPrimary pri; |
| 89 |
Photon p; |
| 90 |
#ifdef PMAP_OOC |
| 91 |
char leafFname [1024]; |
| 92 |
#endif |
| 93 |
|
| 94 |
int setBool(char *str, int pos, int *var) |
| 95 |
{ |
| 96 |
switch ((str) [pos]) { |
| 97 |
case '\0': |
| 98 |
*var = !*var; |
| 99 |
break; |
| 100 |
case 'y': case 'Y': case 't': case 'T': case '+': case '1': |
| 101 |
*var = 1; |
| 102 |
break; |
| 103 |
case 'n': case 'N': case 'f': case 'F': case '-': case '0': |
| 104 |
*var = 0; |
| 105 |
break; |
| 106 |
default: |
| 107 |
return 0; |
| 108 |
} |
| 109 |
|
| 110 |
return 1; |
| 111 |
} |
| 112 |
|
| 113 |
if (argc < 2) { |
| 114 |
puts("Dump photon maps as RADIANCE scene description\n"); |
| 115 |
printf("Usage: %s " |
| 116 |
"[-r radscale1] [-n nspheres1] [-f | -c rcol1 gcol1 bcol1] pmap1 " |
| 117 |
"[-r radscale2] [-n nspheres2] [-f | -c rcol2 gcol2 bcol2] pmap2 " |
| 118 |
"...\n", argv [0]); |
| 119 |
return 1; |
| 120 |
} |
| 121 |
|
| 122 |
for (arg = 1; arg < argc; arg++) { |
| 123 |
/* Parse options */ |
| 124 |
if (argv [arg][0] == '-') { |
| 125 |
switch (argv [arg][1]) { |
| 126 |
case 'r': |
| 127 |
if ((radScale = atof(argv [++arg])) <= 0) |
| 128 |
error(USER, "invalid radius scale"); |
| 129 |
break; |
| 130 |
|
| 131 |
case 'n': |
| 132 |
if ((numSpheres = parseMultiplier(argv [++arg])) <= 0) |
| 133 |
error(USER, "invalid number of spheres"); |
| 134 |
break; |
| 135 |
|
| 136 |
case 'c': |
| 137 |
if (fluxCol) |
| 138 |
error(USER, "-f and -c are mutually exclusive"); |
| 139 |
|
| 140 |
if (badarg(argc - arg - 1, &argv [arg + 1], "fff")) |
| 141 |
error(USER, "invalid RGB colour"); |
| 142 |
|
| 143 |
for (j = 0; j < 3; j++) |
| 144 |
customCol [j] = atof(argv [++arg]); |
| 145 |
break; |
| 146 |
|
| 147 |
case 'f': |
| 148 |
if (intens(customCol) > 0) |
| 149 |
error(USER, "-f and -c are mutually exclusive"); |
| 150 |
|
| 151 |
if (!setBool(argv [arg], 2, &fluxCol)) |
| 152 |
error(USER, "invalid option syntax at -f"); |
| 153 |
break; |
| 154 |
|
| 155 |
default: |
| 156 |
sprintf(errmsg, "unknown option %s", argv [arg]); |
| 157 |
error(USER, errmsg); |
| 158 |
return -1; |
| 159 |
} |
| 160 |
|
| 161 |
continue; |
| 162 |
} |
| 163 |
|
| 164 |
/* Dump photon map */ |
| 165 |
if (!(pmapFile = fopen(argv [arg], "rb"))) { |
| 166 |
sprintf(errmsg, "can't open %s", argv [arg]); |
| 167 |
error(SYSTEM, errmsg); |
| 168 |
} |
| 169 |
|
| 170 |
/* Get format string */ |
| 171 |
strcpy(format, PMAP_FORMAT_GLOB); |
| 172 |
if (checkheader(pmapFile, format, NULL) != 1) { |
| 173 |
sprintf(errmsg, "photon map file %s has unknown format %s", |
| 174 |
argv [arg], format); |
| 175 |
error(USER, errmsg); |
| 176 |
} |
| 177 |
|
| 178 |
/* Identify photon map type from format string */ |
| 179 |
for (ptype = 0; |
| 180 |
ptype < NUM_PMAP_TYPES && strcmp(pmapFormat [ptype], format); |
| 181 |
ptype++); |
| 182 |
|
| 183 |
if (!validPmapType(ptype)) { |
| 184 |
sprintf(errmsg, "file %s contains an unknown photon map type", |
| 185 |
argv [arg]); |
| 186 |
error(USER, errmsg); |
| 187 |
} |
| 188 |
|
| 189 |
/* Get file format version and check for compatibility */ |
| 190 |
if (strcmp(getstr(format, pmapFile), PMAP_FILEVER)) |
| 191 |
error(USER, "incompatible photon map file format"); |
| 192 |
|
| 193 |
/* Dump command line as comment */ |
| 194 |
fputs("# ", stdout); |
| 195 |
printargs(argc, argv, stdout); |
| 196 |
fputc('\n', stdout); |
| 197 |
|
| 198 |
/* Dump common material def if constant for all photons, |
| 199 |
i.e. independent of individual flux */ |
| 200 |
if (!fluxCol) { |
| 201 |
if (intens(customCol) > 0) |
| 202 |
printf(radDefs [ptype].mat, |
| 203 |
customCol [0], customCol [1], customCol [2]); |
| 204 |
else |
| 205 |
printf(radDefs [ptype].mat, colDefs [ptype][0], |
| 206 |
colDefs [ptype][1], colDefs [ptype][2]); |
| 207 |
fputc('\n', stdout); |
| 208 |
} |
| 209 |
|
| 210 |
/* Get number of photons */ |
| 211 |
pm.numPhotons = getint(sizeof(pm.numPhotons), pmapFile); |
| 212 |
|
| 213 |
/* Skip avg photon flux */ |
| 214 |
for (j = 0; j < 3; j++) |
| 215 |
getflt(pmapFile); |
| 216 |
|
| 217 |
/* Get distribution extent (min & max photon positions) */ |
| 218 |
for (j = 0; j < 3; j++) { |
| 219 |
pm.minPos [j] = getflt(pmapFile); |
| 220 |
pm.maxPos [j] = getflt(pmapFile); |
| 221 |
} |
| 222 |
|
| 223 |
/* Skip centre of gravity, and avg photon dist to it */ |
| 224 |
for (j = 0; j < 4; j++) |
| 225 |
getflt(pmapFile); |
| 226 |
|
| 227 |
/* Sphere radius based on avg intersphere dist depending on |
| 228 |
whether the distribution occupies a 1D line (!), a 2D plane, |
| 229 |
or 3D volume (= sphere distrib density ^-1/d, where d is the |
| 230 |
dimensionality of the distribution) */ |
| 231 |
for (j = 0, extent = 1.0, dim = 0; j < 3; j++) { |
| 232 |
rad = pm.maxPos [j] - pm.minPos [j]; |
| 233 |
|
| 234 |
if (rad > FTINY) { |
| 235 |
dim++; |
| 236 |
extent *= rad; |
| 237 |
} |
| 238 |
} |
| 239 |
|
| 240 |
rad = radScale * RADCOEFF * pow(extent / numSpheres, 1./dim); |
| 241 |
|
| 242 |
/* Photon dump probability to satisfy target sphere count */ |
| 243 |
dumpRatio = numSpheres < pm.numPhotons |
| 244 |
? (float)numSpheres / pm.numPhotons : 1; |
| 245 |
|
| 246 |
/* Skip primary rays */ |
| 247 |
pm.numPrimary = getint(sizeof(pm.numPrimary), pmapFile); |
| 248 |
while (pm.numPrimary-- > 0) { |
| 249 |
/* Skip source index & incident dir */ |
| 250 |
getint(sizeof(pri.srcIdx), pmapFile); |
| 251 |
#ifdef PMAP_PRIMARYDIR |
| 252 |
/* Skip primary incident dir */ |
| 253 |
getint(sizeof(pri.dir), pmapFile); |
| 254 |
#endif |
| 255 |
#ifdef PMAP_PRIMARYPOS |
| 256 |
/* Skip primary hitpoint */ |
| 257 |
for (j = 0; j < 3; j++) |
| 258 |
getflt(pmapFile); |
| 259 |
#endif |
| 260 |
} |
| 261 |
|
| 262 |
#ifdef PMAP_OOC |
| 263 |
/* Open leaf file with filename derived from pmap, replace pmapFile |
| 264 |
* (which is currently the node file) */ |
| 265 |
strncpy(leafFname, argv [arg], 1024); |
| 266 |
strncat(leafFname, PMAP_OOC_LEAFSUFFIX, 1024); |
| 267 |
fclose(pmapFile); |
| 268 |
if (!(pmapFile = fopen(leafFname, "rb"))) { |
| 269 |
sprintf(errmsg, "cannot open leaf file %s", leafFname); |
| 270 |
error(SYSTEM, errmsg); |
| 271 |
} |
| 272 |
#endif |
| 273 |
|
| 274 |
/* Load photons */ |
| 275 |
while (pm.numPhotons-- > 0) { |
| 276 |
#ifdef PMAP_OOC |
| 277 |
/* Get entire photon record from ooC octree leaf file |
| 278 |
!!! OOC PMAP FILES CURRENTLY DON'T USE PORTABLE I/O !!! */ |
| 279 |
if (!fread(&p, sizeof(p), 1, pmapFile)) { |
| 280 |
sprintf(errmsg, "error reading OOC leaf file %s", leafFname); |
| 281 |
error(SYSTEM, errmsg); |
| 282 |
} |
| 283 |
#else /* kd-tree */ |
| 284 |
/* Get photon position */ |
| 285 |
for (j = 0; j < 3; j++) |
| 286 |
p.pos [j] = getflt(pmapFile); |
| 287 |
|
| 288 |
/* Get photon normal (currently not used) */ |
| 289 |
for (j = 0; j < 3; j++) |
| 290 |
p.norm [j] = getint(1, pmapFile); |
| 291 |
|
| 292 |
/* Get photon flux */ |
| 293 |
#ifdef PMAP_FLOAT_FLUX |
| 294 |
for (j = 0; j < 3; j++) |
| 295 |
p.flux [j] = getflt(pmapFile); |
| 296 |
#else |
| 297 |
for (j = 0; j < 4; j++) |
| 298 |
p.flux [j] = getint(1, pmapFile); |
| 299 |
#endif |
| 300 |
|
| 301 |
/* Skip primary ray index */ |
| 302 |
getint(sizeof(p.primary), pmapFile); |
| 303 |
|
| 304 |
/* Skip flags */ |
| 305 |
getint(sizeof(p.flags), pmapFile); |
| 306 |
#endif |
| 307 |
|
| 308 |
/* Dump photon probabilistically acc. to target sphere count */ |
| 309 |
if (frandom() <= dumpRatio) { |
| 310 |
if (fluxCol) { |
| 311 |
/* Dump individual material def per photon acc. to flux */ |
| 312 |
getPhotonFlux(&p, customCol); |
| 313 |
printf(radDefs [ptype].mat, |
| 314 |
customCol [0], customCol [1], customCol [2]); |
| 315 |
fputc('\n', stdout); |
| 316 |
} |
| 317 |
|
| 318 |
printf(radDefs [ptype].obj, p.pos [0], p.pos [1], p.pos [2], rad); |
| 319 |
fputc('\n', stdout); |
| 320 |
} |
| 321 |
|
| 322 |
if (ferror(pmapFile) || feof(pmapFile)) { |
| 323 |
sprintf(errmsg, "error reading %s", argv [arg]); |
| 324 |
error(USER, errmsg); |
| 325 |
} |
| 326 |
} |
| 327 |
|
| 328 |
fclose(pmapFile); |
| 329 |
|
| 330 |
/* Reset defaults for next dump */ |
| 331 |
radScale = RADSCALE; |
| 332 |
numSpheres = NSPHERES; |
| 333 |
customCol [0] = customCol [1] = customCol [2] = 0; |
| 334 |
fluxCol = 0; |
| 335 |
} |
| 336 |
|
| 337 |
return 0; |
| 338 |
} |
